Fuse block



1931- c. R. STRAUBING ET AL 1,832,796

FUSE BLOCK Original Filed May 2, 1928 2 Sheets-Sheet l 1 21 cantor Jttormy Nov. 17, 1931. v c. R. STRAUBING ET AL 1,832,796

FUSE BLOCK Original Filed May 2, 1928 2 Sheets-Sheet 2 [r1 wen m war a. 7R Ls'zmaqzy, I I. Die Z7703,

Jlmrmy Patented Nov. 17, 1931 UNITED srATEs PATENT orrica onmns n. s'rnaunme AND FRED n. nrn'rmcn, on sALAmANcA, NEW YORK FUSE BLOCK Application filed May 2, 1928, Serial No. 274,6-t1. Renewed July 28, 1931.

The present invention pertains to fuse blocks and aims to provide a novel structure wherein means is provided for the prevention of tampering with the fuse connections,

as well as means whereby the fuse block may be dismounted for repairs. lhe invention also contemplates the provision of novel socket members wherein means is employed to prevent the insertion er metallic pieces such as coins, for closing the circuit in lieu of the :t'use, after the fuse has become blown and another is not accessible.

The invention briefly consists of a pair of block members, one of which block members has the fuse sockets arranged therein, while a locking means connects the two block members and cannot be operated for releasing the blocks and allowing access to the socket connections except by authorized persons possessing the proper key.

Among the several objects of this invention, the invention contemplates the provision of a structure of great simplicity, which can be manufactured of relatively cheap material, and will withstand longer use than a number of the more expensive devices now in general use.

Various other objects of this invention will become apparent from the following speci fication and claims,

In the drawings wherein like reference characters indicate like parts:

Figure 1 represents a top plan view of the fuse block showing the various conductor 25 wires extending therefrom.

Figure 2 represents a side elevation of the block in partial cut away to disclose the construction of the fuse socket members.

Figure 3 is a top plan view of the lower block, the upper block being removed.

Fig. 4 is a transverse sectional view through the assembled device.

Now for a more specific descri tion of this invention, reference is made to t e drawings wherein like numerals designate like parts.

In thecarr'ying out of the present invention, a pair of substantially rectangular shaped insulating blocks 1 and 2, respective- 1y,-are provided. The block 1 is adapted for w superimposed disposition upon the block 2,

' from the spirit and principles of this invention.

These socket shells are of the usual tubular construction and are open at their top ends. They are secured to the block 2 in the manner disclosed in Figure 3, and are each provided with a projecting plate l for connection to a binding post 5. Suitable conductor wires 6 connect the respective socket shells, while further conductor wires 7 may extend between the blocks for the purpose of supporting the same as well as shielding any branch connections such as 8 that may be necessary. I lit is also probable that these conductor wires 6 and 7 and 8, respectively, will be enclosed by the usual lead conduit pipes terminating in abut-ting relation to the said blocks.

l. fiber washer 9 is adapted to be seated within each socket shell and is formed at its center with a recess 10. A contact member 11 is arranged within the recess at a point substantially below the top surface of the washer, and this contact has suitable connection with the conductor wires. It is also desired, that the fuses employed in conjunction with the present socket shells be provided with a depending contact projection 12, which will depend within the recess 10, when the fuse is threaded into the socket for contact engagement with the contact element'll. Thus it will be seen. that a coin or similarpiece of metal cannot be placed within the socket shell with the expectancy of closing the circuit between the shell and the contact 11 in lieu of the fuse plug 13.

As is disclosed in the drawings, the socket shells are formed with left hand threads on the fuse plug 13. This manner of threading the plugs and sockets is advisable and suggested to manufacturers for fuses from six to thirty amperage capacity. If this practwo is adopted, the lnsertlon of higher amperage fuse plugswill not be permitted with various anchoring members 16 may also be disposed within suitable openings in the bottom side of the block 2, and be sealed by suitable sealing material.

The inner side of the block 1 is formed with suitable recesses to accommodate the various upstanding members on the block 2, while a recess 17 is formed within the top side of the block 1 intermediate its respective ends. Registering openings through the block 1 and block 2 in registry with the opening in the nut member 14.- are adapted to have arranged therethrough an elongated member 18 threaded at its lower end for engagement within the threaded opening of the nut 14. A collar 19 is formed inwardly from the opposite end of the member 18, while the outer end portion of the member is of polyponal shape to provide a key receiving head. 20. Although it is suggested that the tormation be polygonal, any irregularformation may be adopted to accommodate a key insertible thereover to permit the rotation of the member 18 for unthreading the same from engagement with the nut 14;. By this means the two blocks may be locked together and can only be detached by a person possessing the proper key, v

Whereas certain details of the present invention have been qualified specifically, it is to be understood that certain changes in the size, shape or material may be resorted to without departing from the spirit of the invention or the scope of the appended claims.

Having thus described this invention, what is claimed as new is 1. A fuse block of the character described comprising a pair of superimposed sections, one of said sections being adapted to support a fuse socket, the opposed. sides of the said section being provided with complementary grooves, said grooves being formed to receive conductors to the fuse socket, and in which the said conductors are clamped snugly by the said sections, said sections being provided with registerable bores, one of said sections having end bores communicating with a counter-bore, and the other section being provided with a polygonal recess weaves 2. A. fuse block of the class described comprising a pair of separable sections, means on the inner sides of the blocks through whlch conductors can be secured, a bolt for disposition thru said block, one end of the bolt being provided with a polygonal-shaped head, the opposite end of the bolt being threaded and terminating within the adjacent block, a recess in the outer side of one of the blocks into which the threaded end of the bolt projects, a nut for engagement on the threaded end of the bolt. and a sealing material for disposition within the said shaft.

In testimony whereof we afiix our signatures.

CHARLES R. STRAUBING. FRED E. DIETRICH.

' communicating with its bore, a nut for disposition within the said recess, a threaded member for disposition through the registering bores and for engagement with the said nut, and a polygonal shaped head on the said threaded member for normal dispo sit ion within the said counter bore when the sections are in clamped engagement with the conductors, 

